i am unable to connect my tab to pc

Re: i am unable to connect my tab to pc

Has it ever connected? There has been some recent issues with Windows updates affecting drivers. Samsung Kies on my pc had a small update for my Note 3, then asked me to unhook from the usb so it could install a driver on the pc first.
Maybe leave the tab connected on usb for a few minutes at a time until it detects a new driver is needed. Better still install Kies if you haven't done so (I assume Kies works for Tablets as well). Also try usb rather than wifi.